"The two young girls were taken out of the pool by their parents and given CPR. The ambulance officers responded but were unable to revive them," Inspector Inspector Glenn Allen told Nine News.

"All a mother could do when they see their baby like that is just scream at the top of their lungs," Ms Young told the Courier Mail.

"I was screaming and grabbing them and making sure their head was above the water and just yelling because there was nothing I could do."

The tragedy unfolded in just ten minutes, with the girls going missing after eating lunch with their parents and three other siblings. Thinking they had gone outside to play, the couple looked for them out the front of the house, before their son found the girls in the pool.